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Cam wear / low compression could they be related?

  • Thread starter Thread starter haggisbasher
  • Start date Start date
According to the parts fiche the 1100GL has a different petcock from the 80-82 GS750L. Mine has no lever to operate the valve, you need a screwdriver to turn from run to prime and it has no reserve.

Tom
 
According to the parts fiche the 1100GL has a different petcock from the 80-82 GS750L. Mine has no lever to operate the valve, you need a screwdriver to turn from run to prime and it has no reserve.

Tom

The lever less petcock debuted in 1980...and went away the next year on most models. Gas will not flow on Prime until the petcock vacuum line sees a pulse of vacuum. At that point the gas will flow regardless of more vacuum so you need to turn the slot to On after that if you want the fuel to stop flowing.

Petcocks fail in a few different ways including sending fuel down the vacuum line and into the engine via the #2 carb. Those level less petcocks also fail when the check valve inside craps out.

Good thing is they are fairly cheap petcocks so if you have any questions I suggest getting a new one.
 
I suggest you button that bike back up and ride.

Ed, I can't believe you told him this!!! Go ahead & keep running it while the exhaust cam & rockers continue to eat themselves & send MORE crap through the engine?!!! What are you thinking? Ray.
 
Ed, I can't believe you told him this!!! Go ahead & keep running it while the exhaust cam & rockers continue to eat themselves & send MORE crap through the engine?!!! What are you thinking? Ray.

I've seen worse ray. I think the photo makes it look worse than it is.
 
Hey guys

Is it possible that the cams arent really damaged that badly but the rocker bearing material is smeared across the cam lobes for want of a better description. When it warms up again I will pop the cover and try and take some better pics. It looked to me more like material was deposited on the lobes rather than the lobes were worn through.

It would make sense to me that the rocker was designed to be softer than the cam so that the cheaper component wears first. I have no real mechanical experience so I'm just throwing that out there.

Thanks all
Tom
 
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